﻿#region The MIT License
// The MIT License
// 
// Copyright (c) 2011 octalforty studios
// 
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
// 
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
// 
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
#endregion

using octalforty.Wizardby.Core.Compiler.Ast;
using octalforty.Wizardby.Core.Db;
using octalforty.Wizardby.Db.SqlServer2000;

namespace octalforty.Wizardby.Db.SqlServer2008
{
    public class SqlServer2008ScriptGenerator : SqlServer2000ScriptGenerator
    {
        public SqlServer2008ScriptGenerator(IDbStatementBatchWriter statementBatchWriter) : 
            base(statementBatchWriter)
        {
        }

        protected override string GetCreateIndexScript(IAddIndexNode addIndexNode)
        {
            var createIndexScript = base.GetCreateIndexScript(addIndexNode);
            
            //
            // Support for SQL Server 2008 
            // http://www.proace.com/2010/02/11/unique-constraints-on-nullable-columns-in-sql-server-2008/
            var where = addIndexNode.Properties["where"];
            if(where != null)
                createIndexScript = string.Format("{0} where {1};", createIndexScript.TrimEnd(';'), where.Value.AsString());

            return createIndexScript;
        }
    }
}
